Tube threading implement



Nov. 21, 1939. 'H L. HAIQSQN ET AL 2,180,466

TUBE THREADING IMPLEMENT Filed Feb. 28, .1939

Patented Nov. 21, 1939 'fl I f i l .I I u I" f fiuNlTEo srAres PAreNroFr-tce TUBE THREADING- IMPLEMENT 'A `Henry Lauritz Hanson and Henry Lloyd Hanson, Worcester, Mass.; Thekla C. Hanson executrix of Henry Lauritz Hanson, deceased lAlmitteetieh Eeb'ruary 2s, laagst-.tier 316.259,002 4 claims. i (oi. 11o-101) 'Ihis invention relates to a hand supported and I'I is .leftfhanded and the handle is screwed up A hand manipulatedimplement for the purpose of untilitv engages the bottom of the lead screw; threading tubes. The screw-thread on the lead screw is right T'ne principal objects of the invention are to handed andthe rotation' of the work is provided J provide a very simple device for threading thin for by the rotation of the handle-22 in the left 5 tubes consisting of very few parts and avoiding hand direction. j. 1 i.. complications; to provide a construction of this On the frame II is provided a scale 24 with kind, in which tubes of different sizes can be a pointer25 pivoted on a screw 26. This scale is threaded, with a gauge directly connected with for the purpose of setting a threading cutting tool the cutting tool and operating exactly with the 21 so that it will cut the thread properly for tubes 10 cutting tool for placingthe cutting tool in the of different sizes as indicated by the scale. This right position for threading tubes of various tool slides radially in ways 28 on the frame II and sizes, and to provide an improved internal clutch is provided with a pin 29 passing through a for receiving and holding the tube to be threaded. lateral slot 30 in the lever 25, which is a compara- Other objects and advantages of the invention y tively strong lever and not merely a pointer. This i5 will appear hereinafter. lever is operated by hand by a screw 3l and a Reierence 1.s to be had to the accompanying thumb nut 32 in the screw. The screw prodaWlYlg, 111 WhlCh vided with a head 33 on the bottom and the frame Fig; Us a' s ide View 0f a preferred embodiment II is provided with an arcuatev slot 34 in which of tins myentlon this screw 3l can be moved back and forth when 20 Fig 2 l? a plain the thumb nut is loosened. F1g.3 1s a d1ametr1cal sectional View on the Thus, it Wmbe Seen that the pointer 25 can hne.3 3.of Flg 2; beset to whatever diameter is desired on the Fig' 4 1 5 an elevatln of the mtemal Clutch; scale 24 and that it positively carries, by means Fg' 5 s an elevatlon 0f the top 0f the central ef the pin 29, thethreed cutting teer 21 beek and 25 holding screw' forth 1 the wa s 1n the frame I I. 'Ihe o1nter 1s Fig. 6 1s an elevation of` the top of the lead locatelm the Eight p0 p sition and the thumb nut screw, and

is tightened up and the thread cutting tool 21 is Fig. '7 is a side View of the work in the form of h t f the Work of the diameter a tube threaded on the exterior by this device. gcglnptrglsgleor y The invention is designed to provide a thread on the lower end of a piece of thin tubing I0. It The Cutting tool 21 comprises a frame II which has a handle I2 by which the frame is adapted to be supported in one hand of the operator. This frame II is provided at its extreme end with a circular boss I3 having a vertical perforation therethrough, screwthreaded and receiving in said screw-thread a hollow lead screw Ill. This lead screw extends vdown through a cylindrical nut I5 and at the top is provided with a conical end I6. It is threaded throughout its length. Inside the lead screw is a clamping screw I'I having an opposite conical top I8. These two cones furnish a spool-shaped moummg for a' Work Chuck 9 Composed of a of course, it will be understood thet the in- 45 plurality of segments separated from each other termal Clutch 9, Shown Wm be set aside and a n and Connected together by Springs 2- clutch of another size used for a tube of al differ- The left handed screw I'I, by means of a ent internal diameter. nut 2l having an Operating handle 22, iS pulled It win be seen, therefore, that this thread eut- 50 down, pushing up the lead screw I4 and pulling ting teereepabie of cutting threads en thin tubes 50 down the head I8 t0 bind 'hS Chuck. This 6X- of different diameters, is provided with means pands the chuck on the insideof the work It) and for setting the cutting tool for these diierent holds the work in position. In this way the work diameters by the movement of the pointer. This is held in position on the rotating lead screw I4. indicates the diameters on the scale 24. The tool 55 The screw-thread 23 at the bottom of the screw is fixed in its adjusted position in a very simple 55 having been set in the 30 proper position in the manner just .described to cut athread on a tube of predetermined diameter, the tube Ill of that diameter is set on the clutch and the clutch tightened by means of the handle 22 rotating in a left hand direction. As soon as the end of the nut 2| encounters the lead screw I4, the clutch is tightened. Further rotation of the handle 22 draws the lead screw down so that the work makes a revolution for every thread on the lead screw. The tool 21 thus cuts threads 35 Aon the end of the work I0. This tool cuts threads all at the same pitch, irrespective of the diameter of the work.

seen that the parts are few manipulation is also of the i advantages thereof, we do not Wish to be limited to the detailsA herein disclosed, otherwise than as set forth in the claims, and what we claim is:

1. In a device of the character described, the combination with a frame having a rigid handle thereon by which it can be supported, a scale on the frame for indicating the size of the work, a lever pivoted on the frame having a pointer cooperating with the scale, means for clamping the work in adjusted position, means on the frame for supporting the work, and a thread cutting tool movable along a course radial with respect to the work, connected with said lever to be operated thereby toward and from the work. for adjustment.

2. In a device of the character described, the combination with a frame, a scale on the frame for indicating the size of the work, a lever pivoted on the rame having a pointer cooperating with the scale, means on the frame for supporting and feeding the work, anda thread cutting tool movable along a course radial with respect to the work, connected with said lever to be operated toward and from the Work thereby.

3. In a device of the character described, the combination with a frame and a scale on the frame for indicating the size of the Work, of a hand operated lever pivoted on the frame having a pointer cooperating with the scale, means for feeding the Work, and a thread cutting tool adjustable directly by the lever toward and from the work during operation.

4. In a device of the character described, a frame, a scale on the frame, means to support a cylindrical work-piece on the frame at substantially a right angle to the plane of the scale, a lever pivoted to the frame and having a pointer cooperating with the scale, a cutting tool slidable radially of the Work-piece and located in ways in the frame, a surface of said tool being approximately in the plane of the lever and having a stud projecting therefrom, a longitudinal slot in the lever into which the stud extends, whereby the tool is moved longitudinally upon pivoting of the lever.

HENRY L. HANSON. H. LLOYD HANSON.

and adapted to be xed in position 3 

